Background

Once upon a time, there were two elves who liked to grind tires very much. One day the two of them felt bored and began to grind the donkey teacher's old-age room.

很久很久以前，有两个小精灵，他们非常喜欢磨轮胎。一天他们两个人觉得很无聊，便开始磨驴老师的养老房。

Description

The demolition time of the two elves is 2 days and 4 days respectively. Enter the size of the house (m 3) and find out how many days they need to cooperate to demolish the donkey teacher's old-age house.

两个小精灵的拆房时间分别为2天 和 4天，输入房子的大小（m^3），求出他俩合作需要多少天才能拆完驴老师的养老房。

Input

The first row is an integer t, which indicates the number of data groups. In the next line, a small number n indicates the size of the pension room.

第一行一个整数t，表示数据组数。接下来一行，一个小数数n，表示养老房的大小。

Output

A total of T rows, one decimal (two decimal places reserved) in each row, represent the number of days after the old-age house is finished.

共t行，每行一个小数（保留两位小数），表示磨完养老房的天数。

Input

2
0.75
3.25

Output

1.00
4.33

Limitation

对于100%的数据t<=10;
对于100%的数据n>0;

Source

Amorphophallus Orz Group